Vol. 10, Issue 5 (2021)

Author(s):
Gunavathi P, Janaki D, Balasubramaniam P, Alagesan A and Geethanjali S

Abstract:
The Amendments generally used for sodic soil reclamation should be source of sulphates viz., Elemental sulphur, Iron pyrite, Mineral gypsum, Phospho gypsum and Marine gypsum. Characterization of sources by ATR-FTIR is rapid and elementary. The peaks of IR spectra obtained from FTIR is compared with Bio-Rad (Know it all) software, to interpret and qualitative analysis of functional groups in mentioned materials. The active peaks of spectra denote the presence of principle compounds of sulphur as well as gypsum. ATR-FTIR is most promising and non destructive method to precisely provide the result without tiresome conventional chemical analysis of characterization. The strong spectra of gypsum held at 668cm^-1, 1130cm^-1, 1630cm^-1 and 2200cm^-1 range. The OH stretch at 3522cm^-1 and 3400cm^-1 confirmed the presence of gypsum and sulphate compounds. The S-O bending of gypsum observed at 669cm^-1 and 597cm^-1. The S-O stretching and S-O bending of sulphates peaks appeared at 1140- 1080cm^-1 and 680-610cm^-1. The alkyl thioketones(-C=S) of sulphur compounds vibrations found at the range of 1240-1050cm^-1. This helps to confirm that the sources are suitable for sodic soil reclamation.